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|
/*---------------------------------------------------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 2011-2016 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
OpenFOAM is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
Description
Construct an extruded hex cell shape from four straight edges
\*---------------------------------------------------------------------------*/
#include "cellShapeRecognition.H"
#include "labelList.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
namespace Foam
{
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
cellShape extrudedQuadCellShape
(
const label cellIndex,
const labelList& faceLabels,
const faceList& faces,
const labelList& owner,
const labelList& neighbour,
const label pointOffset,
faceList& frontAndBackFaces
)
{
static const cellModel* hexModelPtr_ = NULL;
if (!hexModelPtr_)
{
hexModelPtr_ = cellModeller::lookup("hex");
}
const cellModel& hex = *hexModelPtr_;
// Checking
if (faceLabels.size() != 4)
{
FatalErrorInFunction
<< "Trying to create a quad with " << faceLabels.size() << " faces"
<< abort(FatalError);
}
// make a list of outward-pointing faces
labelListList localFaces(4);
forAll(faceLabels, facei)
{
const label curFaceLabel = faceLabels[facei];
const face& curFace = faces[curFaceLabel];
if (curFace.size() != 2)
{
FatalErrorInFunction
<< "face " << curFaceLabel
<< "does not have 2 vertices. Number of vertices: " << curFace
<< abort(FatalError);
}
if (owner[curFaceLabel] == cellIndex)
{
localFaces[facei] = curFace;
}
else if (neighbour[curFaceLabel] == cellIndex)
{
// Reverse the face. Note: it is necessary to reverse by
// hand to preserve connectivity of a 2-D mesh.
//
localFaces[facei].setSize(curFace.size());
forAllReverse(curFace, i)
{
localFaces[facei][curFace.size() - i - 1] =
curFace[i];
}
}
else
{
FatalErrorInFunction
<< "face " << curFaceLabel
<< " does not belong to cell " << cellIndex
<< ". Face owner: " << owner[curFaceLabel] << " neighbour: "
<< neighbour[curFaceLabel]
<< abort(FatalError);
}
}
// Create a label list for the model
// This is done by finding two edges that do not share any vertices.
// Knowing the opposite pair of edges (with normals poining outward
// is enough to make a cell
if
(
localFaces[0][0] != localFaces[1][1]
&& localFaces[0][1] != localFaces[1][0]
)
{
// Set front and back plane faces
labelList missingPlaneFace(4);
// front plane
missingPlaneFace[0] = localFaces[0][0];
missingPlaneFace[1] = localFaces[1][1];
missingPlaneFace[2] = localFaces[1][0];
missingPlaneFace[3] = localFaces[0][1];
frontAndBackFaces[2*cellIndex] = face(missingPlaneFace);
// back plane
missingPlaneFace[0] = localFaces[0][0] + pointOffset;
missingPlaneFace[1] = localFaces[0][1] + pointOffset;
missingPlaneFace[2] = localFaces[1][0] + pointOffset;
missingPlaneFace[3] = localFaces[1][1] + pointOffset;
frontAndBackFaces[2*cellIndex + 1] = face(missingPlaneFace);
// make a cell
labelList cellShapeLabels(8);
cellShapeLabels[0] = localFaces[0][0];
cellShapeLabels[1] = localFaces[0][1];
cellShapeLabels[2] = localFaces[1][0];
cellShapeLabels[3] = localFaces[1][1];
cellShapeLabels[4] = localFaces[0][0] + pointOffset;
cellShapeLabels[5] = localFaces[0][1] + pointOffset;
cellShapeLabels[6] = localFaces[1][0] + pointOffset;
cellShapeLabels[7] = localFaces[1][1] + pointOffset;
return cellShape(hex, cellShapeLabels);
}
else if
(
localFaces[0][0] != localFaces[2][1]
&& localFaces[0][1] != localFaces[2][0]
)
{
// Set front and back plane faces
labelList missingPlaneFace(4);
// front plane
missingPlaneFace[0] = localFaces[0][0];
missingPlaneFace[1] = localFaces[2][1];
missingPlaneFace[2] = localFaces[2][0];
missingPlaneFace[3] = localFaces[0][1];
frontAndBackFaces[2*cellIndex] = face(missingPlaneFace);
// back plane
missingPlaneFace[0] = localFaces[0][0] + pointOffset;
missingPlaneFace[1] = localFaces[0][1] + pointOffset;
missingPlaneFace[2] = localFaces[2][0] + pointOffset;
missingPlaneFace[3] = localFaces[2][1] + pointOffset;
frontAndBackFaces[2*cellIndex + 1] = face(missingPlaneFace);
// make a cell
labelList cellShapeLabels(8);
cellShapeLabels[0] = localFaces[0][0];
cellShapeLabels[1] = localFaces[0][1];
cellShapeLabels[2] = localFaces[2][0];
cellShapeLabels[3] = localFaces[2][1];
cellShapeLabels[4] = localFaces[0][0] + pointOffset;
cellShapeLabels[5] = localFaces[0][1] + pointOffset;
cellShapeLabels[6] = localFaces[2][0] + pointOffset;
cellShapeLabels[7] = localFaces[2][1] + pointOffset;
return cellShape(hex, cellShapeLabels);
}
else if
(
localFaces[0][0] != localFaces[3][1]
&& localFaces[0][1] != localFaces[3][0]
)
{
// Set front and back plane faces
labelList missingPlaneFace(4);
// front plane
missingPlaneFace[0] = localFaces[0][0];
missingPlaneFace[1] = localFaces[3][1];
missingPlaneFace[2] = localFaces[3][0];
missingPlaneFace[3] = localFaces[0][1];
frontAndBackFaces[2*cellIndex] = face(missingPlaneFace);
// back plane
missingPlaneFace[0] = localFaces[0][0] + pointOffset;
missingPlaneFace[1] = localFaces[0][1] + pointOffset;
missingPlaneFace[2] = localFaces[3][0] + pointOffset;
missingPlaneFace[3] = localFaces[3][1] + pointOffset;
frontAndBackFaces[2*cellIndex + 1] = face(missingPlaneFace);
// make a cell
labelList cellShapeLabels(8);
cellShapeLabels[0] = localFaces[0][0];
cellShapeLabels[1] = localFaces[0][1];
cellShapeLabels[2] = localFaces[3][0];
cellShapeLabels[3] = localFaces[3][1];
cellShapeLabels[4] = localFaces[0][0] + pointOffset;
cellShapeLabels[5] = localFaces[0][1] + pointOffset;
cellShapeLabels[6] = localFaces[3][0] + pointOffset;
cellShapeLabels[7] = localFaces[3][1] + pointOffset;
return cellShape(hex, cellShapeLabels);
}
else
{
FatalErrorInFunction
<< "Problem with edge matching. Edges: " << localFaces
<< abort(FatalError);
}
// Return added to keep compiler happy
return cellShape(hex, labelList(0));
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
} // End namespace Foam
// ************************************************************************* //
|
